Gamma Energy visits the Aperture Science East facility, built after GLaDOS gained sentience. The goal was to create a facility where GLaDOS' research could be examined and tested without harm to employees or other people who actually... mattered, without her knowledge. Pick up a prototype Portal Device and try not to die.

I've made it official. August 8th. This day has been hovering through my mind for a while. It's got its advantages, and I've found that I will indeed be able to make it by then, as long as Valve doesn't break the SDK every two days. A nice, nearby date sounds a whole lot better than "When it's done" as such wonderful games like Duke Nukem Forever, HL2: Episode 3, and Black Mesa Source have chosen.